Steam-boiler superheater.



W. DALTON. STEAM VBOILER SUPERHEATER.

APPLICATION FILE? 1113.20, 1912.

Patented July 9, 19;2.

2 SHEETS-SHEET 1y INVENTON W. DALTN.

STEAM BOILER SUPBRHEATEE.

ABPLIOATION FILED 1113.20. 1912.

1,031,693. Patented July 9, 191.2. Y 2 sHEBTss-sqBL-'rgl`A Il y NVENTOR through the rear portion of a' locomotive WILLIAM Damon, or scnnivncranr, NEW Yonai STEAM-BOILEH SUFEBHEATER. l

LQBLGQS.

. To all whom t mag/.concerns A with prior constructions.

' The improvement claimed is hereinafter Schenectady, in the county of rSchenectady and State of New York, have invented a vcertain .new and useful Improvement in Steam-Boiler Superheaters, of which improvement the following 'is a specification.`

My invention relates to superheaters for steam boilers of the locomotive' type, and more particularlyto those having a com` bustionchamber in the waist of the boiler,'

and 4its objeetr'is'to provide a superheating appliance which shall be readily applicable in'boilers of such character, without -mo'dification of the'stan'dard form and dimensions' of thebo'iler shell'pand tubes, and in which a suicient area of heating surface to insure a high degree of superheat shall be provided, with a substantial reduction in the length of superheater pipes, as 'compared fully set' forth.

In the accompanying drawings: Figure l 1s a vertical longitudlnal central section boiler, illustrating' an embodimentv ofr my invention; Fig. 2, a vertical transverse section through the same, on the line a a of Fig. l, the left hand ha'lf thereof showing the superheating pipes' in section on the line Z) b of Fig. l; Fig. 3, a plan view, partly in section, and on an enlarged scale, of the header, detached; and, Fig. 4, a section, on a further'enlarged scale, through the header and superheater pipe connections1 My invention is herein exemplified as applied in .a locomotive boiler of one of the present standard types, having an outside firebox, vl, connected to a Waist, 2, through which a'plurality of fire tubes, 3, extend from a flue sheet, 4,'at the front end of a combustion chamber, 5, formed in the waist of the' boiler, to a smoke boX- (not shown) at f'suitable and preferred construction, and a firing opening, 8, (one or more) controlled by a door in the usual manner, 1s forined 1n its rearend. y

Prior practicein locomotive boiler super-v heaters has, so far as my knowledge and information extend, embodied practicaily only; twol classes, lrntwvir` respectively, by reason front of the tubes.

Specication of llevtters raient. v atntec July 9', i922, Application filed February 2d, 1912. Serial No. 678,;835.

4 fof the location of the superheating elements, Be it known that I, WILLIAM DAUroN, of4

fmaterial extension and obstruction of the, p

smoke box, and the ,fire tube type, requiring; lthe use of flues ofmaterially,` greater than@I 'ordinary diameter, and`superl1eating pipes of great length, and obstructing the passage of the gases through the siiperheating tub,es. 'A comparatively small number of locomo tives have also been fitted with superllieaters which4 are locatedin ,a compartment interi posed between thefrear steamA generatint'g E' isection, and the front water heating section A of a boiler, said compartment constituting an' intermediatecombustion chamber in ments to their action in their passage from,`

Vthe iireboX tothe tubes. A' reduction of: volume of the space occupied by the superheating element-s -is also designed to be effected. l l

In the practice of my invention, I locate the superheating appliance within the 'com-- bustion chamber, at the front of the iireboX, instead of in the smoke boX- or the fire tubes, or in front of the fire tubes, as in prior practice, thereby utilizing the higher heat of. the products of combustion in their direct passage from the ireboX to and'ithr'ough the combustion chamber, and correspondingly reducing the aggregate length of the pipesy through which the steam traverses while be,

ing subjected to the superheat-ing action of? In order to the products of combustion. admit of the convenient connection of the steam supply and delivery conduits of the superhe'ater, the volume of the combustionl chamber, 5, is increased by the interposition of a transverse bridgewall, 9, of iire brick, between the front of the grate, 7, andthe front Water wall of the firebox, said bridge wall being supported on a bearer, 9,f"se,A cured at'its ends to the mud ring of the firebox. A transverse header', 10,'which is a' substantial metallic easing, of segmental llos . compartment, vthej'supply and deliverypipesH-l' dle to-its ends, and thesuperheated' steam.

form, is supported in the space between the bridge wall and the front water Wall of the firebox, said header being divided by a longitudinal partition, 10?, which is perforated by a 'plurality of bolt holes, intov a saturated steam compartment, 10", anda superheated steam compartment, 10c. The partition, 10, is rearwardly inclined from thev middle tovv the vends of the header, so that the "saturated steam compartment is of gradually increasing transverse sectional area fromits midcompartment isof gradually diminishing transverse sectional areaV from its middle to each of its ends, as clearly shown in Fig. 3.

"Saturated steam supply nozzles or connecting members, 10d, extend downwardly from l' the header,10, adjacent to its ends, said nozzles communicating with the 'saturatedy perheate steam su ply compartment, `1 0", and a susteam delivery nozzle orv connect# ing member, 10', extendsdownwardly'fror'n the middle of theiheade'r, said'nozzlecom-pf municating vwith the superheatedsfdeam compartment, 10?. Elbows, 10? and 10S, are-"connectedto the nozzles, 10d and 10', 'respectively, for the attachment'of saturatedis'lteam supply pi esr leading from; 4the dome other sulta le- Vortion of the lsteam'sp 4the boiler, an of a supcrheatedsteam je'- livery .pipe leading z to lthe cylinders of. he

locomotive, fresp'ectlvely.- Said deliver [pi/ipe 4 lmay aocu'mulateon thel bottom plate; It

will'be obvious that *if 'preferred lthe compart'ment, 10C, ofthe header may be vused as being connected accordingly.

A plurality of' v'horizontally e the' saturated steam compartment', and the compartmenty 10f,' a's the superheated 'steam extending "a'loops'jo return )bends of super ater pipes,

to i planes'f'of the boiler, is located intheddisposed side by side in substantially racliamber 5, adjacent to the shell members composing each of said are preferably, .as shown', 1in the uble returns, extending alterrdly. and rearwardly, and the ends of each loop being connected to the saturated steam compartment and t-he superheiited steam" compartment, respec.

tively, ofthe header,.` '1().y The attachment.

`of thesuperheater pipes "toa-the header is I preferably, as shown',` 'effected-by means of okes, 14', which aredrawnto'a tight bearing on the superheater pipes, and connected to the header rb y'boltsl, passing through :'pipes, I3.

eiiiciency and' value in thel gen- `in railrcadservice 'f .I believe myself'to be the first who has" holes in the partition, 10, and nuts, 15. l.

Tight joint's/areinsured by ball or spherical faced joint rings, 13", formed or fixed on the ends of the superheater pipes, and itting in correspondingly vshaped recesses in the yokes and the header. `Inorder to protect the rear return bend elbows, '13, and the connections of the vsuperhe'ater pipes toithe header, from 'the direct actionof the highl heat of the gases passing over the top of the lbridge Wall, a segmental -shield plate, 17, of

iire clay v[or other suitable refractory mate'- rial, is connected to the bridge wall, a short distance below yits top, and projects for-p' wardly therefrom, above the superheater 4The high eration of steam, of the heating surface pre- {sented in a :combustion chamber which ad- .join's and directlyfcommunicates with ythe rebox of a locomotive boiler, as compared with the heating surface `of the tubes, is Well and universally recognized by those familfiar with the operatlon of boilers of this type, and these combustion chambers 'are nowbeing applied toa considerable extent rendered the advantage of the combustion .chamberavailable for the superheating of stearln, by locating Within it a superheating appl-lance' of such construction as does not involve-the perforation of the Water space f or 'the use of tubes of larger diameter than f those of boilers Working saturated steam, andin which a substantial reduction of the llength of the pipes wit-hinwhich the steam fis superheated, is eii'ected,` without impairment of the capacity of the appliance to afford as high a ldegree of superheat as eX- peri'ence has demonstrated to be' advisable.A I do Vnot therefore4 consider my invention to l,

as eibody its 'spirit andessential characteristie features, and'asm 4be within the or- `beflimited to the specific embodiment herein selected for illustration, and desire to in- 'clude within it such structural modifications 110' dinaryskill of [a nieclganlcfailiar.withl l comotive 'const'riictior' and operation.

. I cla1m asfmy myentlon, and desire to 'secure by Letters Patents-.

, 1. The` combnati'on, wlth'- a"`loc0motive boiler havin a combustion chamber adjoin ,A

ind' the ir'e` oxlof a superheater located inI l -saldcombustion` chamber and havin downlwardlyf-extending steamsup ly an deliv? ery connections leading to. te eterior of:l

the firebox, forward of th-.grate thereof.

2." The combination, with a locomotive boiler having a combustion chamber adjoining the irelrox, of `a-fsuperheater ylocatedi'n said combustion chamber and having downwardly extending steam supp and livery connect-ions leadlng tu. t e

of the reboir, forward ofthe grate thereof,

el* exteru'n"A I' and means for protecting joints of the supe'ieater from the direct action of the heat of the products'of combustion lpassing from the lrebox. i

3. The combination, with a locomotive boiler having a combustion chamber adjoining the rebox, of a bridge wall interposed between the front of the grate and the front water wall of the rebox, and a supervheater locatedl in the combustion chamber 'and having steam supply and delivery connections leading to t-he exterior thereof, betweenthe bridge wall and the front water wall of the firebox.

4. The combination, with a locomotive boiler having a combustion chamber adjoining the irebox, of a bridge wall interposed between the front of the grate and the front water wall of the rebox, a superheater located in the combustion chamber and having steam supply and delivery connections leading to the exterior thereof, in front of said bridge wall, and a bottom plate closing the space between the bridge wall and the front water wall of the firebox.

5. The combination, with a locomotive boiler having a combustion chamber adjoining the frebox, of a bridge wall interposed between the front of the grate and the front water wall of the nrebox, a superheater located in the 'combustion chamber, and having steam supply and delivery connections leading to the exterior thereof, in front of said bridge wall, and a shield of refractory material, connected to and projecting forwardly from the bridge wall above the superheater.

, 6. The combination, with a locomotive boiler having a combustion chamber adjoining the firebox, of a superheater comprising a plurality of loops or return bends of pipe extending longitudinally in the combustion chamber and a header located in frear of said loops of pipe, and having saturated and snperheating compartments communicating with the ends thereof and downwardly extending steam supply and delivery connections leading to the exterior of the combustion chamber, forward of thegrate of the firebox. l

7. The combination, with a locomotive boiler having a combustion chamber adjoining the rebox, of a bridge wall interposed between the front of the grate and the frontwater wall of the firebox, and a superheater comprising a plurality of loops or return'bends of pipe extending longitudinally in the combustion chamber and a segmental header located between Athe bridge wall and the front water wall of the tirehox and having saturated and superheated steam compartments communicating with the ends of the loops of pipe and downwardly extending steam supply and delivery connections leading to the exterior of the combustion chamber, forward of the grate of the irebox.'

8. The combination, with a locomotiveA boiler having a combustion chamber adjoining'the firebox, of a bridge wall interv posed between the front of the grate and the front water wall of the irebox, a superheater comprising a plurality of loops or return bends of pipe extending longitudinally in the combustion chamber and a segmental header located between the bridge wall and the front waterfwallof the lirebox, and having saturated and superheated steam compartments communicating with the ends of the loops of pipe and downwardly extending steam supply. and delivery connections leading to the exterior of the combustion chamber, forward of the grate of the firebox, and/"a shield of refractory material projecting forwardly from the bridge wall above the loops ofpipe.

9. The combination, with'l a locomotive boiler having a combustion chamber adjoining 'the rebox, of a superheater comprising a plurality of loops or return bends of pipe, extending longitudinally side by side in the combustion chamber, in substantially radial planes of the boiler, and a transverse header, of segmental form, having compartments connected to the rear ends of said loops of pipe and downwardly extending steam supply and delivery connections leading to the exterior of the combustion chamber, forward of the firebox grate.

10. A header for a locomotive boiler superheater, consisting of a casing of segmental form, divided' by a double inclined longitudinal partition, which is perforated in a longitudinal plane by a plurality of bolt holes, into a saturated steam compartment of gradually increasing transverse sectional area from its middle to its ends, and a superheated steam compartment of gradually diminishing transverse sectional area from its middle to its ends, said header having, on its convex side, nozzles or eonl'lectin'g members communicating with said steam compartments for the connection of pipes extending below the header.

VVLLTAM DAT/FON. Witnesses (l. (l. S'rlmls, ll. LINDENKOHL. 

